Am Donnerstag, den 24.06.2010, 12:36 +0200 schrieb Hans de Goede: > Hi, > > On 06/23/2010 03:29 PM, Alexey Fisher wrote: > > Hallo all, > > is there any way to force snd-usb-audio to use some "Vendor Specific > > Class" device? > > i currently got two webcams from my friends to take a look on. They are > > cheep gspca based webcams with Mic. I wont to test if snd-usb-audio can > > use it if i force it. Devices it self do not provide any hints for the > > driver. > > > > lsusb -vd 093a:2468 | grep -i class > > bDeviceClass 255 Vendor Specific Class > > bDeviceSubClass 255 Vendor Specific Subclass > > bInterfaceClass 255 Vendor Specific Class > > bInterfaceSubClass 255 Vendor Specific Subclass > > bInterfaceClass 255 Vendor Specific Class > > bInterfaceSubClass 255 Vendor Specific Subclass > > bInterfaceClass 255 Vendor Specific Class > > bInterfaceSubClass 255 Vendor Specific Subclass > > bInterfaceClass 255 Vendor Specific Class > > bInterfaceSubClass 255 Vendor Specific Subclass > > bInterfaceClass 255 Vendor Specific Class > > bInterfaceSubClass 255 Vendor Specific Subclass > > bInterfaceClass 255 Vendor Specific Class > > bInterfaceSubClass 255 Vendor Specific Subclass > > bInterfaceClass 255 Vendor Specific Class > > bInterfaceSubClass 255 Vendor Specific Subclass > > bInterfaceClass 255 Vendor Specific Class > > bInterfaceSubClass 255 Vendor Specific Subclass > > bInterfaceClass 255 Vendor Specific Class > > bInterfaceSubClass 255 Vendor Specific Subclass > > > > regards, > > Alexey > > > > > Don't bother, AFAIK these devices which are pixart pac207bca > based do not contain any microphone at all. If they do they usually > have 2 plugs at the end of their cable a usb plug and an analog > one for the mic. > > Google for pac207bca datasheet to find a useless datasheet, note > that it does contain a listing of the physical pins of the device, > and notice the lack of any pins to connect a microphone too. > > If the pac207 supports a microphone (which I strongly believe > it does not) the mic on these cameras is not a usb audio class > compatible device. The pac207 declares only one interface so > audio data ihas to be handled over the same interface > as the video data. So in order to support the MIC you first need to > find out how it works and then glew an alsa driver onto the > gspca pac207 driver (as only one driver can be bound to a single > usb interface). > > Regards, > > Hans, the pac207 driver maintainer > > > p.s. > > It would have been helpful if you had contacted me about this, I just > happen to be subscribed to the alsa-devel list too. Thank you for your response, i buried this cam yesterday. after some hours of useless hacking i went to "Trust" web page and checked documentation. After i didn't found anything about sound i extracted the driver and didn't found anything about sound ether. Then i took windows and tested this cam... and ... no sound. Memo on me: check documentation before wast time :/ Regards, Alexey Fisher _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
